How to Vet a Peptide Vendor (COAs, Payments, and the 2026 Shakeout)

The 2025–26 vendor shakeout in 30 seconds

Three forces consolidated the peptide vendor market in the last 18 months:

FDA enforcement — 50+ warning letters in a single day (September 2025).
Payment-processor crackdowns — Stripe, PayPal, Square all banned peptide merchants under "research chemicals" categorization. Mastercard tightened BRAM enforcement in 2026.
Voluntary exits — Peptide Sciences shut down (March 2026); Amino Asylum was FDA-raided (June 2025); Science.bio exited earlier.

What's left is a smaller field with better-quality vendors and worse payment friction (lots of crypto, Zelle, ACH). Our vendor directory tracks who's still active.

The five questions to ask any vendor

1. Where's the COA?

A Certificate of Analysis is a third-party HPLC report attesting to the purity and identity of the peptide. The gold standard is Janoshik — a Czech analytical lab used by most reputable vendors. **Do not buy from a vendor who self-publishes COAs without third-party signature.**

2. What payment methods do they accept?

Crypto + Zelle + ACH is the post-2025 norm. Card payment is rarer and indicates a high-risk merchant processor (more expensive for the vendor; likely passed through to you). It does not signal quality.

3. What's their reorder policy if a vial arrives damaged?

Reputable vendors replace damaged or contaminated vials no questions asked. The bad ones make you "prove" the issue with photographs and shipping manifests.

4. Is the website still up after Stripe/PayPal terminated them?

A vendor who can't keep their site up through processor changes is not a vendor with the operational chops to ship a clean product. Check the Outliyr or The Peptide Catalog listings for current status.

5. Do they have an affiliate program?

This is a counterintuitive one — yes is a positive signal. Affiliate programs pay actual commissions to creators and reviewers, which means the vendor has stable cash flow and is willing to be publicly scrutinized in exchange for traffic. No affiliate program in 2026 often means they can't afford to pay anyone.

Red flags

COAs are screenshots, not PDFs from Janoshik
"Trustpilot" reviews are universally 5 stars from accounts created in the same week
Domain registered in the last 60 days
Customer service through Telegram only
Site copy claims FDA-approval for any non-FDA-approved peptide

What we publish

Our vendor directory and our individual vendor profiles include status, COA quality, payment methods, and the discount code we've verified for each affiliate-disclosed partner. We get a small commission on referred orders; that's disclosed inline.

Disclaimer

This is educational content. Peptide Edge does not sell peptides. Vendor selection is your decision; we publish a framework for evaluating one.